210022021221 has 32 divisors (see below), whose sum is σ = 298506055680. Its totient is φ = 131040512064.

The previous prime is 210022021213. The next prime is 210022021247. The reversal of 210022021221 is 122120220012.

It is not a de Polignac number, because 210022021221 - 2³ = 210022021213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210022021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210022025221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15523966 + ... + 15537488.

It is an arithmetic number, because the mean of its divisors is an integer number (9328314240).

Almost surely, 2^210022021221 is an apocalyptic number.

It is an amenable number.

210022021221 is a deficient number, since it is larger than the sum of its proper divisors (88484034459).

210022021221 is a wasteful number, since it uses less digits than its factorization.

210022021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18385.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210022021221 its reverse (122120220012), we get a palindrome (332142241233).

The spelling of 210022021221 in words is "two hundred ten billion, twenty-two million, twenty-one thousand, two hundred twenty-one".